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Superconducting compensation magnet

There must be superconducting solenoid magnets around the final quads in order to compensate the detector solenoidal field for the cases of warm and permanent magnets. Since the compensating magnet has a cryostat etc. , the permanent magnet option may loose one of the big advantages. A thinner cryostat is desired for the smaller dead cone.

Toshiaki Tauchi